Fuse-switch mechanism



March 2 1926.

T. E. MURRAY FUSE S-WITCH MECHANISM K m U m M & W I m s M m m IWFJ March 2 1926.

T. E. MURRAY FUSE SWITCH MECHANISM Filed April 26, 1922 March 2 1926.

T. E. MURRAY FUSE swrrca MECHANISM 7 Sheets-Sheet s INVENTOR.

ATTORNEY.

March 2 1926.

T. E. MURRAY FUSE SWITCH MECHANISM 7 Sheets-Sheet Filed April 26, 1922 INVTOR. EJOMJZM/RRAY ATTORNEY.

iv M

March 2 1926.

T. MURRAY FUSE SWITCH MECHANISM Filed April 26, 1922 March 2, 1926. 1,574,996

' T. E. MURRAY I FUSE SWITCH MECHANISM Filed April 26, 1922 '7 Sheets-Sheet 6 INVENTOR. fiz'oms'EfMr/Rmx F 4 By A'ITORNEY.

1,574,996 T. E. MURRAY FUSE SWITCH MECHANISM Filed Aprll 26 192? 7 s s 7 March 2 1926.

Patented Mar. 2, 1926.

UNITED STATES 1,574,996 PATENT o'FFIc-E.

mnonms E. manner, or BROOKLYN, new you rusrrswncn mnominsm.

Application filed April 26,

T all u'lzom it may concern:

Be it known that I,.Tno.\us E. Morning;

a citizen of the [alter] States, and resident of Brooklyn county of-Kings, and State of New York, lave invented certain new and useful Improvements in Fuse-Switch Mechanism, of which the following is a-specifition cation.

The invention relates to a'switch mechanism and easing therefor, the whole arranged so that when access is )rovided to the terminals, for. insertion o a fuse or for other purposes, the current is broken and when the circuit isclosed the fuse terminals or the like are covered; and so that other relative arrangements ofthe parts ma y be achieved, all as described in the following specification'and covered in the claims.

The accompanying drawings illustrate embodiments of the invention.

Figs. 1 and 2 are pcrspcctive'views illus trating respectively the closed and the open position of the switch; a

F ig. 3 is a horizontal section through the casing with the mechanism therein shown in plan;

Fig. 4 is the same;

Fig. 4" is a detail in vertical section;

Figs. 5 and 6 are similar sections on the lines 5-- 5 and 6-G of Fig. 9;

Fig. 7 is a rear cl v'ation of the circuit breaker Fig. 8 is a vertical of the fuse sockets;

Fig. 9 is a vertical face of the casing and taken on the line !l9 of Fig. 3;

Fig. 10 is an elevation from the rear of the snap mechanism for effecting a complete throw of the switch;

Fig. 11 is a diagram of the connections;

Figs. 12, 13 and 14 illustrate an alternative embodiment of the invention, Fig. 12 being a horizontal section and Figs. 13 and 14 being vertical sections on the correspondingl numbered lines of Fig. 12;

Figs. 15 to 18 illustrate another embodiment of the invention; Fig. 15 being a plan withthe casing closed, Fig. 16 a plan of twofuses and a. bridge inside-the casing, Fig. 17 a longitudinal section with the casing open and Fig. 18 a side elevation of the upper part of the closed casing.

Referring to the embodiment of the invenillustratcd there areprovided in the easa'. longitudinal section through section through one so far outward as 1922. Serial No. 556,818.

ing fixed terminals 1,2 '(Fig. 11) foriconnection with the insid the coils 4 and 5 of the meter. The circuit passes from the coil 4 box, thence through a pair of blades 7 and 8 constituting a mova le bridge to 'a .terminal 9 which is connected to an outside main. The coil 5 of the meter is similarly connected through a'terminal 10, terminals 11 and 12 constituting a bridge, and terminal 13 to the other main of the outside line. The movable bridges are mounted on the end of an arm 14 carried on a. be operated to turn it to position at right angles The terminal 6 is in a the plane of the terminal 9, and the blades 7 andS are similarly located (see Fig. 4); the relative positions being such that when the shaft is turned to the position shown in dotted lines in Fi 9 the rear blade 7 will pass over or beyon the terminal 9 and avoid interference from this terminal. the terminals 10 and 13 on the opposite si e and the corresponding blades 11 and 12 are in different planes, the rear blade 12 being beyond the plane of the terminal 10 so as to pass freely over it in the circuit-hieaking The lower blades 8 and 11 of the bridges swing in paths which overlie the lower portions of the fixed terminals 2, the positions of the blades 7 and 8 in the circuit-breaking position being indicated in dotted lines in Fig. 6, and the blade 7 being to easily clear the high points of'the terminal 2. a

Fig. 9, for example, shows in full lines the circuits closed; and shows in dotted lines the blades 7, 8, 11 and 12 shifted to the circuit-breaking )osition. The cross-arm 14 which carries these bridges, carries also fuse sockets 16 and 17 (Fig. 3). One of these sockets 16 is shown in section in Fig. 8. The shell of the socket is in contact with the blade '12, and the central screw or pin. 18 in the bottom of the socket is insulated from the shell and from the blade 12 and makes contact with the blade 11. When a. fuse 19 is screwed into the socket the two parts 11 and- 12 of the bridge are connected to each other. -In a fuse socket 17 is adapted to receive a fuse 20 which connects the two-parts 7 and 8 of the bri 'e.

The fixed terminals are mounted on a block 21 of porcelain or other insulating mathe circuit-breaking to that shown.

0 circuit 3 and with to a terminal 6 in the,

Similar] planeoutward from similar way the-opposite terial which is sheet metal fixed on the back or base 23 of the The lower end of the shaft 15 a is rounded (Fig. 4) and projects through the-,block 21 an of-which is bent outward and engages a 25, Fi 10, on the end of a tension spring 26 w ich is' fixed at its'opposite'end to the rear. face. -of 'the supporting 2L' springconnection it a common ex- V .pedient for effecting a complete throw of the shaft fromthe-full line position, Fig. 10, to the dotted lineosition, so as tov row; the switch complete 7 to oneor theoth'er of the desiredpositions. c

.frte boxis' formed with'side walls 271 and end wa1lsj28 with the usual or suitable pro- -visionsiorforniingo ,for the passage able cover 29flis rovided over the ower and. the sides.-

' The up end of the horhas a flange 01 ads to overla F the ding'edge If. e ver 29'." heshaftextends'outward a' ffh'rougli 'thecover and has a'squared end hdaphted. to receive the squared o ening in the uh 82 of-a handle 33 by fw'ich it is t'o be turned. The shaft is located within f a acerta which bears at.'its"inner' end a nst'theadJacent'partof a sushingin e block 21nd at its outer endagainst theinterxnediate part of the crossarm 14.

Carriedvalso on the squared end-pf the shaft is [circular plate 3.5. In fact the crossarm 14, the p handle are-riveted 50 each other or- Otherwise fastened together as illustra ce i in Fig.

4; so that they are to be placed on, the end of.thesha ft or withdrawn therefrom togather;

., The cover of the box is provided with diametrically o posite openings 36 and -37. The movable p ate 35 is also formed with o "ngs .in line with the fuse sockets, as am m Fig.8 for the socket 16, and adapt ed to be brought-into roaster with the openin' 36 and 37 in the 1 cover when the switch is thrown e'ntirel tio'n'. Fig. 1- shows the plate 35, representing the switch; and Fig. ,2 shows-the holes in the plate and the endso'f the fuse sockets broizfiht into register-with the holes 36 and a, e handle 33 having been turned to the to open the circuit so that the fuses maiy be inserted without danger.

ig. 8 shows the plate 35 orxned with a depression 38 surrounding the opening 39 with which the socket reg sters, so that the head of the fuse 19 will be back of the cover 29 of the box. Also an annular strip 40of insulatirzg material is arranged around the edge of I e opening 39 to prevent contact of the metal parts of -the fuse with the plate the closed positio'noi position an brackets 22' of carries an arm 24.tne end block;

of connectors of various A,remo v-' with flanges 30' drawal of the cover to 35Qand the hub 32 of theto the open postoles closed by the- 43 on the end of the box. projects through an opening in the front plate 29 in place. The lever and serves to lock the latter or handle 33 being unlocked, if

a fuse blows out the o erator turns to han-d-i die to the position of fuse sockets simultaneou both can be provided When the new fuse sly so that eit er or i". 2 exposin1 both with a new fuse. has'been provided the handle is turned .back to the position of Fig. 1, closing the circuit and at the same time preventing access to the fuse sockets.

The box cover 29 isformed' with a central opening which is large enough to'permit the withby first lifting the latdotted lines at ter to the positionshown in edge from the 29" so as to free its'upper 44 which fits freely around the hub 32 of the handle, as shown in Fi 4; and

flange 31, and then slipping it over the handie in the manner indicated in dotted lines at 29. Tliereupon the handle together with the plate 85, cross bar 14,'fuse sockets and blades carried thereby can also be lifted of the central shaft (first turning the shaft to disenga e the blades from the terminals). This being done, the fixed terminals an su ports are accessible,

he plate 35 is provided with small rounded outward p ro'ections 45 to provide a smooth bearing on .t cover 29. They may. be applied with the same effect to the plate 58 of Figs. 12 and 13- and to the plate (56 of Fig; 17, hereinafter described.

Fuse sockets or holdin devices of various types may be substitute' in place of those 5 iown. Also various styles 'of circuit breaker may be used, and it is not essential -that the fuse socket be interposed in the brid e or circuit breaker. Figs. 12, 13 and 14 illustrate a difllcrent construction' in'this respect. In the apparatus of these figures various details-are omitted, the showing being' directed to the circuit breaker and fuse construction.

The fuse sockets on insulated. iron bracliets' 48, 49 mounted on the side walls of the box or-casing. For each electric line there is a pair of insulated spring terminals50 and filfmounted on the base of the bum The terminal 5,1 jis, con;-

nected to the fusecasing as shown in Fig.

e inner face of the 46 and are supported iat- 14. The screw 52 {m the casing, suitably in sulated from the latter and'from the termi ml 51, is connected to a-terminal 53 spaced slightly above the termingflanlhedshait- 54, Fig. 12, carries a cross-arm 55 ofinsc-ilatmaterial on one end of which is a bridge or conductor 56 for connecting or disconnectiffi theline through the -fuse "and casing '46 an on the other end of which is a similar .brid v57 for connecting. or disconnecting the but: through the fuse and-casin 47. In

. the positions shown. (see Fig. 14) t 11: bridge connects the res ectire terminalsfiO and 53 Of BELElY pair am thus completes the circuit this connection isthrokenr 1 The shaftfcarrie's a-"plate SS-turning with the shaftIa'ml-fl'yi back of the cover late 29 of ,the5box'* and-- wing openings 59 w ich infthejcircnit closing position. shown are out f Zregister; with jthe holesfit) 0f. the box ginturned to open ir'cIuit the. lmle's saiiinii-the I brought-into re"gister-,.witli'the1ho es so of thdcoge'fiahd thus proridemcess to the fuse soclt tstwhich i'e in reg'istefiwith the holes QE'IBQLQQXQI) td'e-permit withdrawal and intion 70 o he'cover.

71, Figr'15, -which limit the angl sertignbfi'eithei' or. both 'o fithe fuses 61,-62.

Figsfih'i to'17 illustrate-a casing'fiti oil,

which the cover (His hinged'so that it may be moved to'openthebox without entirely detaching it. The cover'has a raised circular cntral.- portion (with openin s 65. These-openin nrecbptr' led by a.- circular plate ci pivo the cb' 4v 'anii rhaving openingsb'? which may register..with theo 'ngs'65 of the covet or ma be turne at right an les thereto; so as close the openings 65. 16 plate is' iiorme d with a handle 68 projecting through asIotZ69 in the raised central por- The cover has its central portion offset to accommodatc the movableplate imd, in the particul r design 'illuslratedjfd provide a space for he movable lateenclosed by a slotted wal through whic the ha ea'of'the plate p jects to .the outside above the plane of the rest;,of

the cover. On-'the latter are mouiIted stops ar movement of the handle '68 to the right or left and may serve also as locking posts. Ip the full line osition shown the plate has uncovered tl 'ie openings 65. If it be shifted around to the right against the ,opposite stop 71 the openingsin the coveiflwill be closed. A

The fuse sockets 72 are mounted as shown -in Figs. 16 and 17 on a cross-arm 13 which .cross-arin I 73. Then by throwing the l1 ui'ounte '01'1 the inside of inn claims.

When the cover closed by pressing the plate down. and latching it with the spring latch 77 (Fi '15), the flanges about the openings 67 ht within the flange T6 of the operatingarm 68 to the right from the positlon of 1* 1g. 15, the opcningsin the corcnare closed as above described and at the same time the arm 73' isturned approximately 90 decrees so as to close the switches.

.lhe principle of a the invention may be applied to the control of a single line by' I i using only one 'bridgeor switch and one fuse, or may be applied to any number of lines. a

where it is desirable toexpose the fuse Vlhile the invention is,primariiy-uscfnl sockets through the cover of. therasing, yet

it maybe used also where-there is no such access through the cover and where the latg 5 ten has to bcremoved o1 lifted before access can be had to the fuses; as for example where the electric. company 'aloneis to have access to the partswithin the box;

In the present'case theglaims are directed generically to the three alternative constructions illustrated and specifically to the form shown in Figs. 15 to 18; without, howi ever, waiving-the right to present specific claims for the..other forms in separate applications.

Though I have described with grcat'particularity of certain'sp'ecific embodiments of I my invention, yct'it is not to be understood therefromthat the invention is restricted to 1 the particular embodiments disclosed. Yaf

rious modifications thereof in detail and in t the arrangement of the pal'tsmaybe made by those skilled in the art without departure from the invention as defined in the followlVhat I claim is: l. A fuse switch mechanism including in combination a pair of switch terminals, a movable bridge for connecting said switch terminals and adapted to be disconnected from both of them, fuse terminals, a casing for said mechanism having a cover with an opening and a plate \-'erlyin, 1 said switch terminals and movable with said bridge and adapted to close the opening in the cover when the switch terminals are connected and to open it and permit replacement of a fuse when the switch terminals are disconnected.

2. A use switch mechanism including in combination a pair of switch terminals, a movable bridge for connecting said switch terminals and adapted to be discouncctvd from both of them, fuse terminals carried by said bridge, a casing' for said mechanism having a cover with a Hat portion in which is an opening. a plate overlying said switch terminals and carrying saidbrid ze, said combination a; casing with an opening therein, a plate rotatableon an axis perpendicui to sai by and 'afplate mounted right angles thereto and, movable with said I lar'to the pigment the uncover said opening, a

openim to cover or fuse sodkeg a switch and means adapted tomove said plate to the uncovering position and'at the same opera-- 'tion to open e'switclnr Q '4. A fuse s tch mechanism including in combination a terminals, swit circuit a casing normally preventinfilaccess cl parts and having openings rou h one of itswalls-andmeans rotatablc'in t e plane of said openings for breaking the several circuit and rendering the several fuses re 'laceable at one time;

5. A use switch mechanism including in combination a shaft, 9. bridge carried thereon said shift at shaft adapted in the circuit-closing position of the bridge to prevent replacement of a fuse and in the circuit-breakmg position to permit such replacement.

6. A fuse switch mechanism including in combination a. casing-with a movable cover having 'a flat portion in which is an opening; a plate movable in a plane parallel to the plane of said opening to cover or uncover said opening and a switch including a bridge movable with eluding fuse terminals, said plate and bridge being movabl to permit re lacement ofa fuse between said fuse terimnals when the cover is moved.-

'7. A fuse switch mechanism including in combination a casing with a movable cover having an opening, a plate movable to cover or uncover said openin said late having projecting points providing a aring a amst the tover.

8. i fuse switch mechanisrh including in combination a casing with a movable cover, a switch within the casing and means acceslur'alityof sets of circuit es and fuses, one for each.

said plate and in-.

sible from the outside of the cover for operating said switch, said 0 crating means adapted tobe engaged wit a part of the switch when the cover is in place and to be disen aged therefrom when the cover is move rom its closing position.

9. A. use switch mechanism including in combination a casin with a movable cover, a switch within s'ai casin a pivoted cross bar'by. which said switch its-actuated and a switch operating mechanism accessible from the'outside of the cover and adapted to o eratively'engage said cross bar. when e cover is in place and. be disengaged therefrom when the cover is moved from its closing position. v

10. A casi'n for mechanism of the characterdescribe ,said casing havin a cover with an openig for access to sai mecha- 'nism, in combination with a plate movable in a plane parallel to the plane of the opening to cover or uncover said opening; said cover having an offset portion to accommodate the movable plate.

11. -A casing for mechanism of the character described, said casing having a cover with an opening for access to saidmcchanism, in combination with a plate rotatable in a plane parallel to the plane of the opening to cover or uncover said opening, said cover having a circular portion'oliset and forming a circular recess in which said rotatable plate is located.

12. A casing for mechanism of the charactor described, said casing having a cover with an opening for access to said mechanism, in combination with a plate rotatable in a plane parallel to the plane of the opening; to cover or uncover said openlrg, said cover having a circular portionjfiset out ward and'forming on its inner de a circular recess in whic said rotata le plate is located with its h ndle projecting through a slot in the wall of the recess.

In witness whereof, I have hereunto signed may name.

THOMAS E. jMURR AY. 

